Cast-metal wheel.



N0. 727,826 PATENTED MAY 12, 1903.

I. MoGA'LLUM- CAST METAL. WHEEL.

APPLICATION FILED FEB. 13, 1902.

E0 MODEL.

Elnozntoz witn ooea Patented May 12, 1903.

PATENT OFFrcE.

JAMES MCOALLUM, OF AURORA, ILLINOIS.

CAST-M E TAL WH EEL.

SPECIFICATION formingpart of Letters Patent No. 727,826, dated May 12, 1903. Application filed February 13; 1902. Serial No. 93,889. (No model.)

To all whom it may concern.-

Be it known that I, JAMES MoOALLUM, a citizen of the United States, residing at Aurora, in the county ofKane and State of Illin0is,have invented certain new and usefulImprovements in Cast-Metal Wheels; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

cast-metal wheels of the type shown in Letters Patent No. 352,551, granted to me November 16, 1886.

The object of the invention is to provide in a wheel semihollow spokes alternately-disposed face to face to each other and radiating centrally from the hub.

Many other objects and advantages will be hereinafter referred to and be particularly pointed out in the claims.

In the drawings forming a part of this specification, Figure l is a perspective View of a wheel embodying my invention. Fig. 2 is a detail side elevation of the-same, showing parts in section. Fig. 3 is a transverse section on the line 3 3 Fig. 2.

The same numerals refer to like parts in all thefigures.

The huh I is of cylindrical formation and is cast around a hard-steel or wrought-iron sleeve 2, which is securely fastened in position by the shrinkage of the cast metal. This construction affords ready means for substituting a new sleeve when the old one becomes worn. The spokes 3 are cast integral with the hub and are semihollow or V- shaped in cross-section, each spoke radiating centrally from the hub and joining the latter near the ends and joining the rim on a line with each other, said spokes being arranged in two series, preferably with their open sides facing each other, therebyimparting to the wheel the necessary strength and at the same time minimizing the weight and effecting an economy in the quantity of metal. The rim is preferably U-shaped in crosssection and has a central rib 6, cast with the This invention relates to improvements ontial structure.

Myinvention possesses many advantages over the present state of the art in that a considerable reduction in the weight of the wheel is effected without the loss of the necessary strength. The construction and disposition ofthe spokes relative to the hub and rim effectually brace and strengthen the parts, so

that it matters not at-whatangle a strain should come the wheel will withstand it. Likewise the rim is braced to form a substan- I am aware of cast-metal wheels having tangentially-arrangedspokes; but in many instances this arrangement has decided objections, which for specific purposes the straight spokes have superior advantages. Therefore I make no claim in this case to a tangent spoke; but

What I do claim as my invention, and desire to secure by Letters Patent, is-

1. A cast-metal vehicle-wheel consisting of a hub, semihollow spokes cast with the hub and radiating on a line drawn through the center of the hub, the hollow portion of each spoke being alternately disposed in opposite directions from each other, and a rim cast with and connecting all of the outer ends of the spokes, substantially as desfiibed.

2. A cast-metal vehicle-wheel consisting of a hub, semihollow spokes cast with the hub, said spokes radiating on a line drawn through the center of the hub, and each adjacent spoke joining the hub at opposite ends thereof, the hollow portion of each spoke being alternately disposed inopposite directions from each other, and a rim castwith and connecting all of the outer ends of the spokes, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES MCCALLUM.

Witnesses:

M. I. GRAY, P. Jonas. 

